Security element comprising a plurality of optically variable structures

Patent metadata

Field	Value
Publication number	US-9669647-B2
Application number	US-201214348749-A
Country	US
Kind code	B2
Filing date	Sep 20, 2012
Priority date	Sep 30, 2011
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A security element includes an optically variable structure having a multiplicity of first embossed structures each including at least two flanks which converge at at least one certain angle. In at least one first partial region of the optically variable structure, at least one flank of the first embossed structures respectively has at least one additional embossed structure which is mounted on the flank of the first embossed structures or inserted into the flank of the first embossed structures. The geometry of the at least one additional embossed structure is executed to be at least near-inverse to the geometry of that flank of the first embossed structure on which the at least one additional embossed structure is mounted or inserted.

First claim

The invention claimed is:

1. A security element with an optically variable structure having a multiplicity of first embossed structures, each of the first embossed structures comprising a prism including at least two flanks which converge at least one certain angle, and in at least one first partial region of the optically variable structure, at least one flank of the first embossed structures respectively has at least one additional embossed portion which extends from the flank of the first embossed structures or extends from a depression in the flank of the first embossed structures,
wherein the geometry of the at least one additional embossed portion is executed so as to correspond to the shape of a half of the prism defined by the flank opposite the flank to which the additional embossed structure is applied, the geometry of the at least one additional embossed portion being further executed to be at least near-inverse to the geometry of that flank of the first embossed structure from which the at least one additional embossed portion extends.

2. The security element according to claim 1 , wherein the at least one first partial region has an outline form which contains a first information item, the first information item being optically recognizable to a viewer only in a first viewing-angle range.

3. The security element according to claim 1 , wherein in at least one second partial region of the optically variable structure, at least one other flank of the first embossed structures respectively has at least one second additional embossed portion which extends from the other flank of the first embossed structures or extends from a depression in the other flank of the first embossed structures, and the geometry of the at least one second additional embossed portion is executed so as to be at least near-inverse to the geometry of the other flank of the first embossed structure from which the at least one second additional embossed portion extends.

4. The security element according to claim 3 , wherein the at least one second partial region has an outline form which contains a second information item, the second information item being optically recognizable to a viewer only in a second viewing-angle range.

5. The security element according to claim 1 , wherein the embossed structures have a pyramid-shaped or prism-shaped geometry, and the flanks are the lateral and/or end faces of the embossed structures.

6. The security element according to claim 1 , wherein the surface of the optically variable structure has a homogeneous color tone at least in the region where the first embossed structures are disposed.

7. The security element according to claim 6 , wherein the security element consists of a substrate into which the first embossed structures are embossed and which has a homogeneous color tone, the color tone of the surface of the optically variable structure corresponding to the color tone of the substrate of the security element.

8. The security element according to claim 6 , wherein the surface of the optically variable structure has applied thereto an imprint or a coating with a homogeneous color tone.

9. The security element according to claim 8 , wherein a reflective or metallic or metallically reflective coating which is applied on the surface of the embossed elements produces the homogeneous color tone.

10. The security element according to claim 1 , wherein the near-inverse geometry of the additional embossed portion corresponds to a mirrored geometry of the at least one flank of the first embossed structure, a mirror plane being aligned perpendicular to a surface of the security element, in the center of the at least one flank of the first embossed structure and parallel to the baseline of the flank of the first embossed structure,
the additional embossed portion having a first and second flank, the first flank extending from the at least one flank at an angle near-perpendicular to the at least one flank and near parallel to the opposite flank, and the second flank extending from the first embossed structure at an angle near-perpendicular to a lower surface of the security element.

11. A security element with an optically variable structure having a multiplicity of first embossed structures, each of the first embossed structures comprising a prism including at least a first and second flank, which converge at least one certain angle, and in at least one first partial region of the optically variable structure, the first flank of the first embossed structures has at least one additional embossed portion including a third and fourth flank, which converge at a certain angle, the third flank being near perpendicular to the first flank and near parallel to the second flank, and the fourth flank being aligned near-perpendicular to the surface of the security element and near-parallel to a baseline of the first flank of the first embossed structures.

Assignees

• Giesecke & Devrient Gmbh

Inventors

• Mayer Karlheinz
• Huynh Thanh-Hao
• Franz Peter

Classifications

• B41M3/14

  Security printing {(securities B42D25/29)} · CPC title

• B42D25/29

  Securities; Bank notes · CPC title

• B42D25/425 Primary

  by deformation, e.g. embossing · CPC title

• B42D25/324

  Reliefs · CPC title

• G02B5/045 Primary

  Prism arrays · CPC title